EP2243364B1 - Selective heteroaryloxy-acetamide-based herbicides - Google Patents

Description

The invention relates to novel selective herbicidal, synergistic active ingredient combinations which consist of a known heteroaryloxy-acetamide on the one hand and a known, herbicidally active compound and optionally the crop-compatibility-improving compounds on the other hand and can be used with particular success for selective weed control in various crops ,

Heteroaryloxyacetamides are as strong, especially effective against monocot weeds herbicides subject of a number of patent applications (see. EP-A 5501 . EP-A 18497 . EP-A 29171 . EP-A 94514 . EP-A 100044 . EP-A 100045 . EP-A 161602 . EP-A 195237 . EP-A 348734 . EP-A 348737 . DE-A 4317323 ). However, the activity of these compounds and / or their tolerance to crops are not always entirely satisfactory.

Further, active ingredient combinations of heteroaryloxy-acetamides and other herbicidally active compounds to achieve a synergistic effect (see. WO-A 94/02014 . WO-A-96/07323 . WO-A-96/11575 . WO-A-96/17519 . WO-A-98/08383 , see. also US-A-5858920 . US-A-5945379 . US-A-5985797 . EP-A 1123654 . US-A 6001774 ) or from heteroaryloxy-acetamides and compounds which can improve the crop-plant tolerance of herbicides (cf. DE-A 3418167 , see. also US-A-5858920 ) known. Even with these combination products, however, the application properties are not always completely satisfactory.

Surprisingly, it has now been found that a known active compound from the series of heteroaryloxy-acetamides when combined with a known herbicidally active compound and optionally the crop-compatibility-improving compounds pronounced synergistic effects the anti-weed activity and / or significantly improves the crop plant tolerance and particularly advantageous as a broad effective combination preparation for the selective control of weeds in crops, such as cotton, barley, corn, potatoes, rapeseed, rice, soy, sunflower, wheat and Sugarcane can be used.

1. (a) Verbindung N-i-Propyl-N-(4-fluor-phenyl)-α-(5-trifluormethyl-1,3,4-thiadiazol-2-yl-oxy)-acetamid (Flufenacet)
   ("Wirkstoff der Gruppe 1") und
2. (b) der Verbindung 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5- (methoxymethyl)-3-pyridincarbonsäure (Imazamox)
   ("Wirkstoff der Gruppe 2").

The invention relates to selective herbicidal compositions, characterized by an effective content of an active ingredient combination consisting of

1. (a) Compound Ni-Propyl-N- (4-fluoro-phenyl) -α- (5-trifluoromethyl-1,3,4-thiadiazol-2-yl-oxy) -acetamide (Flufenacet)
   ("Group 1 drug") and
2. (b) the compound 2- [4,5-dihydro-4-methyl-4- (1-methylethyl) -5-oxo-1H-imidazol-2-yl] -5- (methoxymethyl) -3-pyridinecarboxylic acid (Imazamox )
   ("Group 2 drug").

The active substance of group 1 is described in the above-mentioned patent applications or patents.

The active substance of group 2 can be assigned to its chemical structure according to the following class of drugs:

Imidazolinones (e.g., imazamox).

It has now surprisingly been found that the above-defined active compound combinations of heteroaryloxy-acetamide and the active ingredient of group 2 with largely good crop tolerance have a particularly high herbicidal activity and in various crops, especially in barley, potatoes, corn, rice, Soya and wheat can be used for the selective control of monocotyledonous and dicotyledonous weeds and that they can also be used to control monocotyledonous and dicotyledonous weeds in the semi-non-selective range.

Surprisingly, the herbicidal activity of the active compound combinations according to the invention is considerably higher than the sum of the effects of the individual active compounds.

There is thus an unpredictable synergistic effect and not just an effect supplement. The new drug combinations are well tolerated in many cultures, with the new drug combinations also fight otherwise difficult to control weeds well. The new drug combinations thus represent a valuable enrichment of the herbicides.

The synergistic effect of the active compound combinations according to the invention is particularly pronounced in certain concentration ratios. However, the weight ratios of the active ingredients in the drug combinations can be varied in relatively large ranges. In general, 1 part by weight of active compound of group 1 accounts for 0.01 to 1000 parts by weight, preferably 0.02 to 500 parts by weight and more preferably 0.05 to 100 parts by weight of active compound of group 2.

• Flufenacet + Imazamox.

Examples of the active compound combinations according to the invention are:

• Flufenacet + Imazamox.

According to the invention, all plants and parts of plants can be treated. In this context, plants are understood as meaning all plants and plant populations, such as desired and undesired wild plants or crop plants (including naturally occurring crop plants). Crop plants may be plants produced by conventional breeding and optimization methods or by biotechnology and genetic engineering methods or combinations of these methods can be obtained, including the transgenic plants and including the plant varieties protectable or non-protectable plant varieties. Plant parts are to be understood as meaning all aboveground and underground plant parts and organs of the plants, such as shoot, leaf, flower and root, examples of which include leaves, needles, stems, stems, flowers, fruiting bodies, fruits and seeds, and roots, tubers and rhizomes. The plant parts also include vegetative and generative propagation material, such as cuttings, tubers, rhizomes, offshoots and seeds.

The treatment according to the invention of the plants and plant parts with the active ingredients is carried out directly or by acting on their environment, habitat or storage space according to the usual treatment methods, e.g. by dipping, spraying, vaporizing, atomizing, spreading, spreading and in propagation material, in particular in the case of seeds, by single or multilayer coating.

Among the plants obtained by biotechnological and genetic engineering methods or by a combination of these methods are those plants which tolerate so-called 4-HPPD, EPSP and / or PPO inhibitors, e.g. Acuron plants.

• Dikotyle Unkräuter der Gattungen: Abutilon, Amaranthus, Ambrosia, Anoda, Anthemis, Aphanes, Atriplex, Bellis, Bidens, Capsella, Carduus, Cassia, Centaurea, Chenopodium, Cirsium, Convolvulus, Datura, Desmodium, Emex, Erysimum, Euphorbia, Galeopsis, Galinsoga, Galium, Hibiscus, Ipomoea, Kochia, Lamium, Lepidium, Lindernia, Matricaria, Mentha, Mercurialis, Mullugo, Myosotis, Papaver, Pharbitis, Plantago, Polygonum, Portulaca, Ranunculus, Raphanus, Rorippa, Rotala, Rumex, Salsola, Senecio, Sesbania, Sida, Sinapis, Solanum, Sonchus, Sphenoclea, Stellaria, Taraxacum, Thlaspi, Trifolium, Urtica, Veronica, Viola, Xanthium.
• Dikotyle Kulturen der Gattungen: Arachis, Beta, Brassica, Cucumis, Cucurbita, Helianthus, Daucus, Glycine, Gossypium, Ipomoea, Lactuca, Linum, Lycopersicon, Nicotiana, Phaseolus, Pisum, Solanum, Vicia.
• Monokotyle Unkräuter der Gattungen: Aegilops, Agropyron, Agrostis, Alopecurus, Apera, Avena, Brachiaria, Bromus, Cenchrus, Commelina, Cynodon, Cyperus, Dactyloctenium, Digitaria, Echinochloa, Eleocharis, Eleusine, Eragrostis, Eriochloa, Festuca, Fimbristylis, Heteranthera, Imperata, Ischaemum, Leptochloa, Lolium, Monochoria, Panicum, Paspalum, Phalaris, Phleum, Poa, Rottboellia, Sagittaria, Scirpus, Setaria, Sorghum.
• Monokotyle Kulturen der Gattungen: Allium, Ananas, Asparagus, Avena, Hordeum, Oryza, Panicum, Saccharum, Secale, Sorghum, Triticale, Triticum, Zea.

The active compounds according to the invention can be used, for example, in the following plants:

• Dicotyledonous weeds of the genera: Abutilon, Amaranthus, Ambrosia, Anoda, Anthemis, Aphanes, Atriplex, Bellis, Bidens, Capsella, Carduus, Cassia, Centaurea, Chenopodium, Cirsium, Convolvulus, Datura, Desmodium, Emex, Erysimum, Euphorbia, Galeopsis, Galinsoga Galium Hibiscus Ipomoea Kochia Lamium Lepidium Lindernia Matricaria Mentha Mercurialis Mullugo Myosotis Papaver Pharbitis Plantago Polygonum Portulaca Ranunculus Raphanus Rorippa Rotala Rumex, Salsola, Senecio, Sesbania, Sida, Sinapis, Solanum, Sonchus, Sphenoclea, Stellaria, Taraxacum, Thlaspi, Trifolium, Urtica, Veronica, Viola, Xanthium.
• Dicotyledonous cultures of the genera: Arachis, Beta, Brassica, Cucumis, Cucurbita, Helianthus, Daucus, Glycine, Gossypium, Ipomoea, Lactuca, Linum, Lycopersicon, Nicotiana, Phaseolus, Pisum, Solanum, Vicia.
• Monocotyledonous weeds of the genera: Aegilops, Agropyron, Agrostis, Alopecurus, Apera, Avena, Brachiaria, Bromus, Cenchrus, Commelina, Cynodon, Cyperus, Dactyloctenium, Digitaria, Echinochloa, Eleocharis, Eleusine, Eragrostis, Eriochloa, Festuca, Fimbristylis, Heteranthera, Imperata , Ishumum, Leptochloa, Lolium, Monochoria, Panicum, Paspalum, Phalaris, Phleum, Poa, Rottboellia, Sagittaria, Scirpus, Setaria, Sorghum.
• Monocotyledonous cultures of the genera: Allium, Pineapple, Asparagus, Avena, Hordeum, Oryza, Panicum, Saccharum, Secale, Sorghum, Triticale, Triticum, Zea.

However, the use of the active compound combinations according to the invention is by no means restricted to these genera, but extends in the same way to other plants.

The active compound combinations to be used according to the invention can be used both in conventional cultivation methods (row crops with suitable row width) in plantation crops (eg wine, fruit, citrus) as well as in industrial and track systems, on paths and squares, but also in stubble treatment and minimum tillage methods become. They are also suitable as Abbrenner (Krautabtötung eg in potatoes) or as Defoliantien (eg in cotton). Furthermore, they are suitable for use on fallow land. Other fields of application are nurseries, forestry, grassland and ornamental plants.

The active compound combinations can be converted into the customary formulations, such as solutions, emulsions, wettable powders, suspensions, powders, dusts, pastes, soluble powders, granules, suspension-emulsion concentrates, active substance-impregnated natural and synthetic substances and ultrafine encapsulations in polymeric substances.

These formulations are prepared in a known manner, e.g. by mixing the active compounds with extenders, ie liquid solvents and / or solid carriers, if appropriate using surface-active agents, ie emulsifiers and / or dispersants and / or foam-forming agents.

In the case of using water as an extender, e.g. also organic solvents can be used as auxiliary solvents. Suitable liquid solvents are essentially: aromatics, such as xylene, toluene, or alkylnaphthalenes, chlorinated aromatics and chlorinated aliphatic hydrocarbons, such as chlorobenzenes, chloroethylenes or methylene chloride, aliphatic hydrocarbons, such as cyclohexane or paraffins, e.g. Petroleum fractions, mineral and vegetable oils, alcohols such as butanol or glycol and their ethers and esters, ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone or cyclohexanone, strongly polar solvents such as dimethylformamide and dimethyl sulfoxide, and water.

Suitable solid carriers are:
For example, ammonium salts and ground natural minerals, such as kaolins, clays, talc, chalk, quartz, attapulgite, montmorillonite or diatomaceous earth and synthetic minerals, such as finely divided silica, alumina and silicates, as solid carriers for granules in question: eg broken and fractionated natural rocks such Calcite, marble, pumice, sepiolite, dolomite and synthetic granules of inorganic and organic flours and granules of organic material such as sawdust, coconut shells, corn cobs and tobacco stalks; as emulsifying and / or foam-producing agents come into question: eg nonionic and anionic emulsifiers, such as polyoxyethylene fatty acid esters, polyoxyethylene fatty alcohol ethers, for example alkylaryl polyglycol ethers, alkylsulfonates, alkyl sulfates, arylsulfonates and protein hydrolysates; suitable dispersants are: for example lignin-sulphite liquors and methylcellulose.

Adhesives such as carboxymethyl cellulose, natural and synthetic powdery, granular or latex polymers such as gum arabic, polyvinyl alcohol, polyvinyl acetate, and natural phospholipids such as cephalins and lecithins and synthetic phospholipids may be used in the formulations. Other additives may be mineral and vegetable oils.

Dyes such as inorganic pigments, e.g. Iron oxide, titanium oxide, ferrocyan blue and organic dyes such as alizarin, azo and metal phthalocyanine dyes and trace nutrients such as salts of iron, manganese, boron, copper, cobalt, molybdenum and zinc.

The formulations generally contain between 0.1 and 95% by weight of active ingredients, preferably between 0.5 and 90%.

The active compound combinations according to the invention are generally used in the form of ready-to-use formulations. However, the active substances contained in the active ingredient combinations can also be mixed in individual formulations in the application, i. in the form of tank mixes are used.

The novel drug combinations can continue to be used as such or in their formulations in admixture with other known herbicides, which in turn finished formulations or tank mixes are possible. A mixture with other known active ingredients such as fungicides, insecticides, acaricides, nematicides, bird repellants, growth factors, plant nutrients and soil conditioners is also possible. For certain applications, in particular postemergence, it may also be advantageous be included in the formulations as further additives plant-compatible mineral or vegetable oils (eg the commercial preparation "Oleo DuPont 11E") or ammonium salts such as ammonium sulfate or ammonium thiocyanate.

The novel drug combinations can be used as such, in the form of their formulations or the use forms prepared therefrom by further dilution, such as ready-to-use solutions, suspensions, emulsions, powders, pastes and granules. The application is done in the usual way, e.g. by pouring, spraying, spraying, dusts or spreading.

The active compound combinations according to the invention can be applied before and after the emergence of the plants, that is, in the pre-emergence and postemergence process. They can also be incorporated into the soil before sowing.

A synergistic effect is always present in herbicides if the herbicidal action of the active ingredient combination is greater than that of the individual active substances applied.

The expected effect for a given combination of two herbicides can be calculated as follows (cf. COLBY, SR: "Calculating synergistic and antagonistic responses of herbicidal combinations", Weeds 15, pp. 20-22, 1967 ):

If

• X =% damage by herbicide A (active substance of group 1) at p kg / ha application rate
  and
• Y =% damage by herbicide B (active substance of group 2) at q kg / ha application rate
  and
• E = the expected damage to herbicides A and B at p and q kg / ha application rate,
  then $$\mathrm{e}=\mathrm{X}+\mathrm{Y}-\left(\mathrm{X}*\mathrm{Y}/\mathrm{100}\right)\mathrm{,}$$
  

If the actual damage is greater than calculated, the combination is over-additive in its effect, that is, it shows a synergistic effect.

In fact, the active ingredient combinations of the present invention have the property that their herbicidal activity found is stronger than calculated, that is, the new active ingredient combinations act synergistically.

Claims (5)

1. Composition, comprising an effective amount of an active compound combination consisting of

   (a) compound N-i-propyl-N-(4-fluoro-phenyl)-α-(5-trifluoromethyl-1,3,4-thiadiazol-2-yl-oxy)-acetamide (flufenacet).
   ("active compound of group 1") and

   (b) the compound 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-(methoxymethyl)-3-pyridinecarboxylic acid (imazamox)
   ("active compound of group 2").
2. Composition according to Claim 1, characterized in that from 0.01 to 1000 parts by weight of the active compound(s) from the second group of herbicides (component b)) are used per part by weight of active compound of group 1.
3. Use of a composition according to either of Claims 1 and 2 for controlling undesirable plants.
4. Method for controlling undesirable plants, characterized in that compositions according to either of Claims 1 and 2 are allowed to act on the undesirable plants and/or their habitat.
5. Process for preparing a herbicidal composition, characterized in that a composition according to either of Claims 1 and 2 is mixed with surfactants and/or extenders.